/*
 * @Author: hucc
 * @Date: 2021-09-24 16:03:53
 * @LastEditors: hucc
 * @LastEditTime: 2021-09-24 16:09:47
 * @Description: 
 */
//ES7新特性
//3**3=27
//判断数组的原型方法includes()用来判断一个数组是否包含某一个指定的值
var arr = [1, 2, 3, 4, 5]
console.log(arr.includes(1)); //true